The stem glass tray is a smart product from a small restaurant in Oita Prefecture specifically designed for carrying multiple wine glasses at once. It's a tray with little holes in it that you can hook up to eight wine glasses in, and a 9th hole for the thumb.
Product page (Japanese)

Looks like if you tilt it enough, they may actually slide off. Thats only if the waiter is drunk enough.
Posted by: Dragonfang18 | August 16, 2009 at 10:53 PM